<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>bootstrap</title>
    <link rel="stylesheet" href="../css/common.css">
    <link rel="stylesheet" href="./bootstrap/css/bootstrap.css">
    <style>
        .container {
            border: 1px solid lightcoral;
        }

        .row {}

        .row>div {
            height: 100px;
            box-shadow: 0 0 1px red;
            text-align: center;
            line-height: 100px;
        }
    </style>
</head>

<body>
    <div class="container">
        <!-- 栅格系统，自适应各种设备 -->
        <div class="row">
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">1</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">2</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">3</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">4</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">5</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">6</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">7</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">8</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">9</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">10</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">11</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">12</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">13</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">14</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">15</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">16</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">17</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">18</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">19</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">20</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">21</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">22</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">23</div>
            <div class="col-xs-6 col-sm-3 col-md-2 col-lg-1">24</div>
        </div>
        <div class="row">
            <div class="col-md-4">1-4</div>
            <div class="col-md-4 col-md-offset-4">9-12</div>
        </div>
        <div class="row">
            <div class="col-xs-1">1</div>
            <div class="col-xs-1 col-xs-offset-1">1</div>
            <div class="col-xs-1 col-xs-offset-1">1</div>
            <div class="col-xs-1 col-xs-offset-1">1</div>
            <div class="col-xs-1 col-xs-offset-1">1</div>
            <div class="col-xs-1 col-xs-offset-1">1</div>
        </div>
    </div>
    <div class="container">
        <div class="dropdown">
            <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown"
                aria-haspopup="true" aria-expanded="true">
                地区
                <span class="caret"></span>
            </button>
            <ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
                <li><a href="#">北京</a></li>
                <li><a href="#">上海</a></li>
                <li><a href="#">南京</a></li>
                <li role="separator" class="divider"></li>
                <li><a href="#">苏州</a></li>
            </ul>
        </div>

        <div class="row">
            <nav class="navbar navbar-default">
                <div class="container-fluid">
                    <!-- Brand and toggle get grouped for better mobile display -->
                    <div class="navbar-header">
                        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
                            data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
                            <span class="sr-only">Toggle navigation</span>
                            <span class="icon-bar"></span>
                            <span class="icon-bar"></span>
                            <span class="icon-bar"></span>
                        </button>
                        <a class="navbar-brand" href="#">Brand</a>
                    </div>

                    <!-- Collect the nav links, forms, and other content for toggling -->
                    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                        <ul class="nav navbar-nav">
                            <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
                            <li><a href="#">Link</a></li>
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button"
                                    aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
                                <ul class="dropdown-menu">
                                    <li><a href="#">Action</a></li>
                                    <li><a href="#">Another action</a></li>
                                    <li><a href="#">Something else here</a></li>
                                    <li role="separator" class="divider"></li>
                                    <li><a href="#">Separated link</a></li>
                                    <li role="separator" class="divider"></li>
                                    <li><a href="#">One more separated link</a></li>
                                </ul>
                            </li>
                        </ul>
                        <form class="navbar-form navbar-left">
                            <div class="form-group">
                                <input type="text" class="form-control" placeholder="Search">
                            </div>
                            <button type="submit" class="btn btn-default">Submit</button>
                        </form>
                        <ul class="nav navbar-nav navbar-right">
                            <li><a href="#">Link</a></li>
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button"
                                    aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
                                <ul class="dropdown-menu">
                                    <li><a href="#">Action</a></li>
                                    <li><a href="#">Another action</a></li>
                                    <li><a href="#">Something else here</a></li>
                                    <li role="separator" class="divider"></li>
                                    <li><a href="#">Separated link</a></li>
                                </ul>
                            </li>
                        </ul>
                    </div><!-- /.navbar-collapse -->
                </div><!-- /.container-fluid -->
            </nav>
        </div>
        <div class="row">
            <nav aria-label="Page navigation">
                <ul class="pagination">
                    <li>
                        <a href="#" aria-label="Previous">
                            <span aria-hidden="true">&laquo;</span>
                        </a>
                    </li>
                    <li><a href="#">1</a></li>
                    <li><a href="#">2</a></li>
                    <li><a href="#">3</a></li>
                    <li><a href="#">4</a></li>
                    <li><a href="#">5</a></li>
                    <li>
                        <a href="#" aria-label="Next">
                            <span aria-hidden="true">&raquo;</span>
                        </a>
                    </li>
                </ul>
            </nav>
        </div>
        <div class="row">
            <button type="button" class="btn btn-info">
                <i class="glyphicon glyphicon-ok"></i> Action 
            </button>
        </div>
    </div>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.js"></script>
    <script src="./bootstrap/js/bootstrap.js"></script>
</body>

</html>